Yeah, the quarter bore advocates probably loved those data, as .25 cal. deer rifles seem to perform best.
I'm not a quarter bore fan and would retort with: "too small a sampling for statistical significance"...
The more subtle the difference in measured data, the larger the cohort necessary for a definitive conclusion.
There was a significant difference between how far deer ran, hit by soft vs. hard bullets, therefore the sampling size was probably sufficient for a conclusion.
It seems with Southern WT's, soft bullets kill quicker than hard bullets.
With bigger, tougher critters, I'm sure the results would be different, thus the art of selecting the most effective ammo for the game being hunted.
DF